I have a Toshiba SATELLITE L855D-S5220 and I have a AMD A8-4500M APU with AMD Radeon HD 7640G Graphics card and I get about 1.9 GHz of CPU. I was wondering if there is anyway I can upgrade my process so I would be able to play games like the DayZ mod and the DayZ Standalone? If so links would be helpful where I could purchase the materials I would need.